The Stones...

This is a City of Stones
Every single thing here is made of some form of stone. All the buildings, the streets, the sidewalks. Every sidewalk looks something like this - small stones arranged in patterns. You can tell they've been walked upon for hundreds of years, they're uneven, worn down, broken. Just thinking about the manual work it took to create these is mind-boggling.

Here's an example of a newer sidewalk abutting an older one. Even the new sidewalks are made of stone, though as is usually the case with newer things - theyr'e simpler and uglier and more pragmatic.

There is even a strange "drip rock" wall in the Senate gardens.